Korotchenko, V.V. “Comparative Characteristic of Podyllian and Carpathian Phenotypes of Helleborus Purpurascens Waldst. Et Kit. (Ranunculaceae Juss.) in Conditions of Culture”. Plant Introduction 38 (June 1, 2008): 42-44. Accessed November 5, 2024. http://plantintroduction.org/index.php/pi/article/view/728.